水稻覆膜旱作对稻田土壤微生物生态质量的影响

在淹水栽培和覆膜栽培方式下，通过田间试验研究了土壤微生物生态质量随水稻生长期的变化情况。研究结果表明，土壤微生物生态质量随着水稻生长期延长而降低，土壤物质周转和循环速度减慢。与淹水栽培方式相比，无论是在水稻分蘖期还是灌浆期，在覆膜栽培方式下土壤微生物生物量相对较高; 土壤电子运输系统活度更强; 土壤蛋白质和土壤总酚含量更高。这说明与淹水栽培方式相比，覆膜栽培方式有利于改善土壤微生物生态质量，加速土壤物质周转和循环。

Effects of Dry-Cultivated and Plastic Film-Mulched Rice Planting on Microorganism Ecological Quality in a Paddy Field Soil

Changes of soil microorganism ecological quality during the rice growing stage under film mulched cultivated and submerged cultivated way in a field experiment were studied. Results showed that soil microorganism ecological quality decreased with the rice growing stage extending, leading to the speed of soil substance turning over and recycling become slower. Under film mulched cultivated way, the amount of soil microbial biomass was larger, the soil electron transport system activity was more active, the contents of soil total protein and phenol were higher at tillering stage or filling stage of rice, compared with those under submerged cultivated way. It indicates that film mulched cultivated way can improve soil microorganism ecological quality and accelerate soil substance turning over and recycling comparing to submerged cultivated way.